Message Handling with Boolean Algebra Ben Deane / CppCon / 2024-09-16 1Alternative Title "The Unreasonable Effectiveness of Boolean Algebra in Software Design, Showing the Particular Application of of a Message Handling Library, with an Excursion into the Roots of Programming" 2Frontmatter No AI/LLM was used in the creation of this talk. Code is simplified for slides; may have some errors in this talk is about The workings of a message-handling library. How messages and the fields in them are specified. Efficiently identifying (with matchers) a message coming off the wire. The role of Boolean

address these pain points: ● End-to-end : The test framework validates the end (client) to end (broker/exchange) algo behavior. ● Controlled external dependencies : All external dependencies system. It sets up an internal test version of the system with a collection of components, a mocked message channel, and mocked dependencies. ● A BDD layer: Using cpp-cucumber (open source), this layer

Implementations 13 Bloomberg Dependency Injection System Analysis Component Injection Trade Security Broker Pricing Sizing Sending Execute Trade Cancel Trade Reprice Trade Dependency Injection Data bidYield_, askYield_); //... } protected: // ExtraFields std::optional<Broker> bidBroker_; std::optional<Broker> askBroker_; std::optional bidYield_; std::optional askYield_; const std::optional& LocalAsk, const std::optional<Broker>& bidBroker, const std::optional<Broker>& askBroker, const std::optional& bidYield,

auto field for url and/or revision and you have uncommitted changes in your repository a warning message will be printed: $ conan export . Hello/0.1@demo/testing Hello/0.1@demo/testing: WARN: There are ˓→fields. 40 Chapter 5. Creating Packages Conan Documentation, Release 1.20.5 As the warning message explains, the auto fields won’t be replaced unless you specify --ignore-dirty, and by default, the object to see if there is an URL, a license and a description and if missing, warns the user with a message through the output. This is done before the recipe is exported to the local cache. The pre_source()

auto field for url and/or revision and you have uncommitted changes in your repository a warning message will be printed: $ conan export . Hello/0.1@demo/testing Hello/0.1@demo/testing: WARN: There are ˓→fields. 40 Chapter 5. Creating Packages Conan Documentation, Release 1.19.3 As the warning message explains, the auto fields won’t be replaced unless you specify --ignore-dirty, and by default, the object to see if there is an URL, a license and a description and if missing, warns the user with a message through the output. This is done before the recipe is exported to the local cache. The pre_source()

object to see if there is an URL, a license and a description and if missing, warns the user with a message through the output. This is done before the recipe is exported to the local cache. The pre_source() include_directories(${ZLIB_INCLUDE_DIRS}) target_link_libraries(enough ${ZLIB_LIBRARIES}) else() message(FATAL_ERROR "Zlib not found") endif() In addition to automatic find_package support, CMAKE_MODULE_PATH else() message(WARNING "The file conanbuildinfo.cmake doesn't exist, you have to run conan␣ ˓→install first") endif() If the conanbuildinfo.cmake file is not found, it will print a warning message in the

auto field for url and/or revision and you have uncommitted changes in your repository a warning message will be printed: 40 Chapter 5. Creating Packages Conan Documentation, Release 1.26.1 $ conan export upload' command will prevent uploading recipes with 'auto' values in these␣ ˓→fields. As the warning message explains, the auto fields won’t be replaced unless you specify --ignore-dirty, and by default, the object to see if there is an URL, a license and a description and if missing, warns the user with a message through the output. This is done before the recipe is exported to the local cache. The pre_source()

auto field for url and/or revision and you have uncommitted changes in your repository a warning message will be printed: 40 Chapter 5. Creating Packages Conan Documentation, Release 1.25.2 $ conan export upload' command will prevent uploading recipes with 'auto' values in these␣ ˓→fields. As the warning message explains, the auto fields won’t be replaced unless you specify --ignore-dirty, and by default, the object to see if there is an URL, a license and a description and if missing, warns the user with a message through the output. This is done before the recipe is exported to the local cache. The pre_source()

auto field for url and/or revision and you have uncommitted changes in your repository a warning message will be printed: 40 Chapter 5. Creating Packages Conan Documentation, Release 1.23.0 $ conan export upload' command will prevent uploading recipes with 'auto' values in these␣ ˓→fields. As the warning message explains, the auto fields won’t be replaced unless you specify --ignore-dirty, and by default, the object to see if there is an URL, a license and a description and if missing, warns the user with a message through the output. This is done before the recipe is exported to the local cache. The pre_source()

auto field for url and/or revision and you have uncommitted changes in your repository a warning message will be printed: 40 Chapter 5. Creating Packages Conan Documentation, Release 1.24.1 $ conan export upload' command will prevent uploading recipes with 'auto' values in these␣ ˓→fields. As the warning message explains, the auto fields won’t be replaced unless you specify --ignore-dirty, and by default, the object to see if there is an URL, a license and a description and if missing, warns the user with a message through the output. This is done before the recipe is exported to the local cache. The pre_source()